When I run Total Visual Agent 2007 for the first time, I get error number 3633.

The user does not have the full permissions needed to do work over the network, or on specific databases. Please see your Network Administrator to obtain any needed privileges, or permissions to have full rights to the database or network.

You have the executed the Agent Monitor prior to opening the Agent Manager. Please ensure that you run the Agent Manager at least once before running the Agent Monitor. The Agent Manager needs to setup the tasks, so it doesn't make sense to run the Monitor to execute tasks until they are created.